Gustav Gärtner (September 28, 1855 - November 4, 1937) was an Austrian pathologist who was born in Pardubice, Bohemia. In 1879 he earned his doctorate at the University of Vienna. Afterwards, he remained in Vienna as an assistant to Salomon Stricker (1834-1898), later as a professor. In 1918 he became a "full professor" at the University of Vienna.